I agree that it does not look good as they use it, but thy would never take navy blue out as the primary color. Old gold and blue are the state colors, so that would probably not happen.
https://en.wikipedia.org/wiki/List_of_U.S._state_colors
I would not be opposed to a black and old gold(yellow) uniform worn once a year in a night game, though. Such as these:

That would look nice on an updated template. Then they could wear the new Gold Cup kits as their clash, IMO.
One thing that I don't like about the Gold Cup kits are how the stars are split up to leave a gap for the competition patch on the sleeve. Take off the star on the lower part of the sleeve, and they are perfect.

For me I go with:
Left: Western Metal Supply Building at Petco in San Diego
Left Center: The Green Moster at Fenway
Center Field: PNC Park with the Clemente Bridge
Right Field: Wrigley...just for the ivy.